/* ──────────────────────────────────────────────────────────
   ARGENTUM BIŻUTERIA — stylesheet
   Paleta: grafit / off-white / złoto
   Typografia: Cormorant Garamond (display) + Inter (body)
   ────────────────────────────────────────────────────────── */

:root {
  /* color tokens */
  --c-bg:           #FAFAF7;
  --c-bg-warm:     #F4F0E8;
  --c-bg-dark:    #0E0E0E;
  --c-bg-dark-2:  #161616;
  --c-text:        #1A1A1A;
  --c-text-muted: #6B6B6B;
  --c-text-light:  #EEEAE0;
  --c-gold:        #C9A961;
  --c-gold-dark:   #8B7355;
  --c-gold-soft:   rgba(201, 169, 97, 0.15);
  --c-line:        rgba(0, 0, 0, 0.08);
  --c-line-light:  rgba(255, 255, 255, 0.12);

  /* type */
  --f-display: 'Cormorant Garamond', 'Playfair Display', Georgia, serif;
  --f-body:    'Inter', -apple-system, BlinkMacSystemFont, 'SF Pro Text', system-ui, sans-serif;

  /* spacing rhythm */
  --s-1:  4px;
  --s-2:  8px;
  --s-3: 16px;
  --s-4: 24px;
  --s-5: 32px;
  --s-6: 48px;
  --s-7: 64px;
  --s-8: 96px;
  --s-9: 128px;

  /* layout */
  --max-w: 1240px;
  --radius: 4px;
  --radius-lg: 14px;

  /* motion */
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
}

/* ────────  RESET  ──────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--f-body);
  font-size: 16px;
  line-height: 1.6;
  color: var(--c-text);
  background: var(--c-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}
img, video { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; border: 0; background: none; color: inherit; }
ul { list-style: none; }

/* ────────  REUSABLE  ──────── */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--s-4);
}
.eyebrow {
  font-family: var(--f-body);
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--c-text-muted);
  font-weight: 500;
  margin-bottom: var(--s-3);
}
.eyebrow--gold { color: var(--c-gold); }

.h2 {
  font-family: var(--f-display);
  font-weight: 400;
  font-size: clamp(2rem, 4.5vw, 3.5rem);
  line-height: 1.05;
  letter-spacing: -0.01em;
  color: var(--c-text);
  margin-bottom: var(--s-4);
}
.h2 em { font-style: italic; color: var(--c-gold-dark); }
.h2--light { color: var(--c-text-light); }
.h2--light em { color: var(--c-gold); }

.lead {
  font-size: clamp(1rem, 1.4vw, 1.15rem);
  color: var(--c-text-muted);
  max-width: 56ch;
  line-height: 1.65;
}
.lead--light { color: rgba(238, 234, 224, 0.7); }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 28px;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.03em;
  border-radius: 999px;
  transition: all 0.35s var(--ease);
  cursor: pointer;
}
.btn--gold {
  background: var(--c-gold);
  color: #0E0E0E;
}
.btn--gold:hover {
  background: var(--c-gold-dark);
  color: var(--c-text-light);
  transform: translateY(-1px);
}
.btn--ghost {
  background: transparent;
  color: var(--c-text-light);
  border: 1px solid rgba(255, 255, 255, 0.4);
}
.btn--ghost:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.8);
}
.btn--block { width: 100%; padding: 16px; }

/* ────────  NAV  ──────── */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px var(--s-5);
  background: rgba(250, 250, 247, 0);
  backdrop-filter: blur(0);
  -webkit-backdrop-filter: blur(0);
  transition: background 0.4s var(--ease), padding 0.4s var(--ease), backdrop-filter 0.4s var(--ease);
}
.nav.is-scrolled {
  background: rgba(250, 250, 247, 0.85);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--c-line);
  padding: 10px var(--s-5);
}
.nav__brand {
  display: flex;
  align-items: center;
  gap: 12px;
}
.nav__logo {
  height: 44px;
  width: auto;
  transition: opacity 0.3s var(--ease), filter 0.3s var(--ease);
  filter: brightness(0) invert(1);
}
.nav.is-scrolled .nav__logo { filter: none; }
.nav__wordmark {
  font-family: var(--f-display);
  font-size: 15px;
  font-weight: 500;
  line-height: 1.05;
  letter-spacing: 0.02em;
  color: #fff;
  transition: color 0.3s var(--ease);
  text-transform: uppercase;
}
.nav__wordmark em {
  font-style: italic;
  font-weight: 400;
  color: var(--c-gold);
  text-transform: none;
  letter-spacing: 0;
  display: block;
  font-size: 17px;
  margin-top: 1px;
}
.nav.is-scrolled .nav__wordmark { color: var(--c-text); }

.nav__links {
  display: flex;
  gap: var(--s-6);
}
.nav__links a {
  font-size: 14px;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.92);
  letter-spacing: 0.02em;
  position: relative;
  transition: color 0.3s var(--ease);
}
.nav.is-scrolled .nav__links a { color: var(--c-text); }
.nav__links a::after {
  content: '';
  position: absolute;
  bottom: -6px;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--c-gold);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform 0.35s var(--ease);
}
.nav__links a:hover::after { transform: scaleX(1); }

.nav__toggle {
  display: none;
  width: 32px;
  height: 32px;
  flex-direction: column;
  gap: 5px;
  justify-content: center;
}
.nav__toggle span {
  display: block;
  width: 22px;
  height: 1.5px;
  background: #fff;
  transition: background 0.3s var(--ease), transform 0.3s var(--ease), opacity 0.3s var(--ease);
}
.nav.is-scrolled .nav__toggle span { background: var(--c-text); }
.nav.is-open .nav__toggle span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.nav.is-open .nav__toggle span:nth-child(2) { opacity: 0; }
.nav.is-open .nav__toggle span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* ────────  HERO  ──────── */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  color: #fff;
  background: var(--c-bg-dark);
}
.hero__video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 1;
  opacity: 0.65;
}
.hero__overlay {
  position: absolute;
  inset: 0;
  z-index: 2;
  background: linear-gradient(180deg, rgba(14,14,14,0.45) 0%, rgba(14,14,14,0.65) 60%, rgba(14,14,14,0.9) 100%);
}
.hero__content {
  position: relative;
  z-index: 3;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--s-4);
  width: 100%;
  padding-top: 80px;
}
.hero__eyebrow {
  font-size: 13px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--c-gold);
  margin-bottom: var(--s-3);
  font-weight: 500;
}
.hero__wordmark {
  font-family: var(--f-display);
  font-size: clamp(1.4rem, 2.3vw, 2rem);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.92);
  font-weight: 400;
  margin-bottom: var(--s-5);
  line-height: 1;
}
.hero__wordmark em {
  font-style: italic;
  color: var(--c-gold);
  letter-spacing: 0.04em;
  text-transform: none;
  font-weight: 500;
}
.hero__title {
  font-family: var(--f-display);
  font-weight: 300;
  font-size: clamp(2.5rem, 7vw, 6rem);
  line-height: 1.02;
  letter-spacing: -0.02em;
  margin-bottom: var(--s-5);
  color: #fff;
  max-width: 16ch;
}
.hero__title em {
  font-style: italic;
  color: var(--c-gold);
  font-weight: 400;
}
.hero__sub {
  font-size: clamp(1rem, 1.5vw, 1.2rem);
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.82);
  max-width: 52ch;
  margin-bottom: var(--s-6);
}
.hero__cta {
  display: flex;
  gap: var(--s-3);
  flex-wrap: wrap;
}
.hero__scroll {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 3;
  width: 26px;
  height: 42px;
  border: 1.5px solid rgba(255,255,255,0.4);
  border-radius: 14px;
  display: block;
}
.hero__scroll span {
  display: block;
  width: 3px;
  height: 8px;
  background: var(--c-gold);
  border-radius: 2px;
  margin: 6px auto 0;
  animation: scroll-dot 2s var(--ease) infinite;
}
@keyframes scroll-dot {
  0%   { transform: translateY(0); opacity: 1; }
  60%  { transform: translateY(14px); opacity: 0; }
  61%  { transform: translateY(0); opacity: 0; }
  100% { transform: translateY(0); opacity: 1; }
}

/* ────────  SECTIONS  ──────── */
.section {
  padding: var(--s-9) 0;
  position: relative;
}
.section--light { background: var(--c-bg); }
.section--dark  { background: var(--c-bg-dark); color: var(--c-text-light); }
.section--dark .eyebrow { color: rgba(238, 234, 224, 0.5); }
.section__head {
  text-align: center;
  max-width: 720px;
  margin: 0 auto var(--s-8);
}
.section__head .lead { margin: 0 auto; }

/* ────────  TWO-COLUMN  ──────── */
.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--s-8);
  align-items: center;
}
.two-col__text > p { margin-bottom: var(--s-3); }
.two-col__text > p.lead { margin-bottom: var(--s-4); color: var(--c-text-muted); }
.section--dark .two-col__text > p { color: rgba(238, 234, 224, 0.75); }
.two-col__media {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--c-bg-warm);
  aspect-ratio: 4 / 3;
}
.two-col__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 1.2s var(--ease);
}
.two-col__media:hover img { transform: scale(1.04); }

.stats {
  display: flex;
  gap: var(--s-6);
  margin-top: var(--s-6);
  padding-top: var(--s-5);
  border-top: 1px solid var(--c-line);
}
.stat { display: flex; flex-direction: column; }
.stat__num {
  font-family: var(--f-display);
  font-size: 2.5rem;
  line-height: 1;
  color: var(--c-gold-dark);
  font-weight: 500;
}
.stat__label {
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--c-text-muted);
  margin-top: var(--s-2);
}

/* ────────  OFFER  ──────── */
.offer-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--s-3);
  margin-bottom: var(--s-7);
}
.offer {
  background: var(--c-bg-dark-2);
  border: 1px solid var(--c-line-light);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform 0.5s var(--ease), border-color 0.5s var(--ease);
  display: flex;
  flex-direction: column;
}
.offer:hover {
  transform: translateY(-4px);
  border-color: rgba(201, 169, 97, 0.4);
}
.offer__img {
  aspect-ratio: 4 / 3;
  background: #fff;
  overflow: hidden;
}
.offer__img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.8s var(--ease);
}
.offer:hover .offer__img img { transform: scale(1.06); }
.offer__body {
  padding: var(--s-4);
  display: flex;
  flex-direction: column;
  flex: 1;
}
.offer__title {
  font-family: var(--f-display);
  font-size: 1.55rem;
  font-weight: 500;
  color: #fff;
  margin-bottom: var(--s-3);
  line-height: 1.15;
}
.offer__text {
  font-size: 14px;
  line-height: 1.6;
  color: rgba(238, 234, 224, 0.7);
  margin-bottom: var(--s-4);
  flex: 1;
}
.offer__link {
  font-size: 14px;
  font-weight: 500;
  color: var(--c-gold);
  letter-spacing: 0.02em;
  transition: gap 0.3s var(--ease), color 0.3s var(--ease);
  display: inline-flex;
  gap: 6px;
}
.offer__link:hover {
  gap: 12px;
  color: #fff;
}

.offer-extra {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--s-6);
  padding-top: var(--s-6);
  border-top: 1px solid var(--c-line-light);
}
.offer-extra__col h4 {
  font-family: var(--f-display);
  font-size: 1.3rem;
  font-weight: 500;
  color: var(--c-gold);
  margin-bottom: var(--s-2);
}
.offer-extra__col p {
  font-size: 15px;
  color: rgba(238, 234, 224, 0.65);
  line-height: 1.65;
}

/* ────────  GALLERY  ──────── */
.gallery {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--s-3);
}
.gallery__item {
  border-radius: var(--radius);
  overflow: hidden;
  cursor: zoom-in;
  background: var(--c-bg-warm);
  aspect-ratio: 4 / 3;
  position: relative;
}
.gallery__item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.7s var(--ease), filter 0.5s var(--ease);
}
.gallery__item:hover img {
  transform: scale(1.06);
  filter: brightness(1.05);
}

/* ────────  CONTACT FORM  ──────── */
.contact {
  margin-top: var(--s-6);
  padding-top: var(--s-5);
  border-top: 1px solid var(--c-line-light);
  display: flex;
  flex-direction: column;
  gap: var(--s-4);
}
.contact li {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.contact__label {
  font-size: 12px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: rgba(238, 234, 224, 0.45);
}
.contact__value {
  font-family: var(--f-display);
  font-size: 1.4rem;
  color: var(--c-text-light);
  transition: color 0.3s var(--ease);
}
a.contact__value:hover { color: var(--c-gold); }

.form {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--c-line-light);
  padding: var(--s-6);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  gap: var(--s-4);
}
.field {
  display: flex;
  flex-direction: column;
  gap: var(--s-2);
}
.field span {
  font-size: 12px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: rgba(238, 234, 224, 0.55);
}
.field input,
.field textarea {
  font-family: var(--f-body);
  font-size: 15px;
  color: var(--c-text-light);
  background: transparent;
  border: 0;
  border-bottom: 1px solid var(--c-line-light);
  padding: 10px 0;
  resize: vertical;
  transition: border-color 0.3s var(--ease);
}
.field input:focus,
.field textarea:focus {
  outline: none;
  border-bottom-color: var(--c-gold);
}
.field textarea { min-height: 80px; }
.form__note {
  font-size: 13px;
  color: var(--c-gold);
  min-height: 1.2em;
}

/* ────────  FOOTER  ──────── */
.footer {
  background: var(--c-bg-dark);
  border-top: 1px solid var(--c-line-light);
  padding: var(--s-6) 0;
  color: rgba(238, 234, 224, 0.5);
}
.footer__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--s-3);
  text-align: center;
}
.footer__logo {
  height: 56px;
  width: auto;
  margin-bottom: var(--s-2);
}
.footer__wordmark {
  font-family: var(--f-display);
  font-size: 1.6rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: rgba(238, 234, 224, 0.92);
  font-weight: 400;
  margin: var(--s-1) 0 var(--s-3);
  line-height: 1;
}
.footer__wordmark em {
  font-style: italic;
  color: var(--c-gold);
  letter-spacing: 0.04em;
  text-transform: none;
  font-weight: 500;
}
.footer__copy { font-size: 13px; }
.footer__addr { font-size: 13px; letter-spacing: 0.05em; }

/* ────────  LIGHTBOX  ──────── */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(14, 14, 14, 0.95);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--s-5);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.4s var(--ease);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}
.lightbox.is-open {
  opacity: 1;
  pointer-events: auto;
}
.lightbox img {
  max-width: 90vw;
  max-height: 88vh;
  border-radius: var(--radius);
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.6);
}
.lightbox__close {
  position: absolute;
  top: 24px;
  right: 28px;
  font-size: 36px;
  line-height: 1;
  color: #fff;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  transition: background 0.3s var(--ease);
}
.lightbox__close:hover { background: rgba(255, 255, 255, 0.12); }

/* ────────  REVEAL ANIMATIONS  ──────── */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 1s var(--ease-out), transform 1s var(--ease-out);
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  .hero__scroll span { animation: none; }
  html { scroll-behavior: auto; }
}

/* ────────  RESPONSIVE  ──────── */
@media (max-width: 1100px) {
  .offer-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 900px) {
  .section { padding: var(--s-8) 0; }
  .two-col {
    grid-template-columns: 1fr;
    gap: var(--s-6);
  }
  .two-col__media { aspect-ratio: 16 / 10; }
  .offer-extra { grid-template-columns: 1fr; gap: var(--s-4); }
  .gallery { grid-template-columns: repeat(2, 1fr); }
  .stats { gap: var(--s-4); flex-wrap: wrap; }
  .stat__num { font-size: 2rem; }

  .nav { padding: 12px var(--s-3); }
  .nav__toggle { display: flex; }
  .nav__links {
    position: fixed;
    top: 0;
    right: 0;
    width: min(80vw, 320px);
    height: 100vh;
    background: rgba(14, 14, 14, 0.95);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    flex-direction: column;
    gap: var(--s-5);
    padding: 100px var(--s-5) var(--s-5);
    transform: translateX(100%);
    transition: transform 0.4s var(--ease);
  }
  .nav.is-open .nav__links { transform: translateX(0); }
  .nav__links a { color: #fff !important; font-size: 18px; }

  .hero__title { font-size: clamp(2rem, 9vw, 3.5rem); }
  .form { padding: var(--s-4); }
}
@media (max-width: 600px) {
  .nav__wordmark { font-size: 12px; }
  .nav__wordmark em { font-size: 14px; }
}
@media (max-width: 600px) {
  .offer-grid { grid-template-columns: 1fr; }
}
@media (max-width: 480px) {
  .gallery { grid-template-columns: 1fr; }
  .hero__cta { width: 100%; }
  .hero__cta .btn { flex: 1; min-width: 140px; }
  .nav__logo { height: 36px; }
  .nav__wordmark { display: none; }
  .footer__wordmark { font-size: 1.3rem; }
}